Apparatus for intaglio printing.



F. T. 0011x5 11. APPARATUS FOR INTAGL'I O PRINTING.

APPLICATION FILED JUNE 23| I915.

Patented July 25,1916.

l'iwosnztofn Frederic/i ZZCor/Yptt wzmmesi cmm hkAiiarn ey UNrrn sT TEsPATENT ora ion-1 FREDERICK T. CORKETT, or, ASHTEAD, mamas, ASSIGNOR T0AMERICAN, LIIHO- GRAPHIC COMPANY, OF NEW YORK, N. Y A CORPORATION OF NEWYORK.

APPARATUS FOR IN TAGLIO PRINTING.

' Application filed June 23, 1915. Serial No. 35,751.

.. the appearance of the product, to control the amount of ink depositedupon the paper, andto assure that the plain portions of the 1 rollersshall carry no ink to the paper.

' apparatus.

The invention is adapted for use in connection with evaporative inks incontrolling the quantity of ink deposited by the designed surfaceuponthe paper.

, The drawings accompanying this application illustrate an example of myimproved In such drawings, Figure 1 is an end elevation of portions ofthe mechanism, certain parts however, being on'cross section at aboutthe plane of the line 11 of Fig. 2. Fig. 2 is a front elevation of themechanism. and, Fig. 3 is. a detail of a form of air blast nozzle.

One drawback in the use-of inta'glio or photo-etched rollers in printingis that the unetched portions. no matter how carefully polished, havecertain surface imperfections, invisible frequently to the naked eye,but which, nevertheless, rctain ink and convey this to. the portions of.ie paper which are not intended to be inked. Al10tl18I"dlS-. advantagehas been that atmospheric conditions, varying conditions of, the paperworkedupon, and of the ink, and the overetching of the rolls, hasproduced undesirable results in the product. The present improvement isdesigned for providing a controllable regulation for the ink or rathercontrollable regulation for the amount of ink delivered from the etchingto the surface of the paper irrespective oft he amount of ink left onsuch etching after it has passed the scraper or other ink removingdevice.

The mechanism herein shown is illustra tive of my improved apparatus andthe procedure described is to be understood as being Specification ofLetters Patent.

Patented July 25, 1916.

an illustrative example of a meth'odpf using the .same.

T he invention asnow practised in the United States of America employsan etchedsurface of cylindrical form as the design controlled air blastto the freshly scraped surface-of the cylinder prior to the transferenceof the ink therefrom. Evaporative inks are preferably employedinpractising my invention The printing results,' are" governable by properpositioning, and ad-' justment of the nozzle supplying the air,

and by the adjustment of the volume and 7 force of air.

The intaglio printing surface, the photo gravure or etched cylinder 5,inthe illustrationis shown coacting with the pressure cylinder 6. Theink issupplied to the cylinder by a fountain roller'l', from-an ink pan8. The ink is preferably appliedin a flood, and the surplus removed by ascraper 9, of some suitable construction. Means are shown in the-form ofset screws 10 and 11 for scttingthe cylinders or rollers together.

A travelin cushion or blanket 12, is shown interposed fbetween thepressure cylinder .6 and printing cylinder 5 and the web of paper 13.,Guiding devices are illustrated for the webiof paper and the endlessblanket or cushion 19.. The rollers or cylinders 5, 6

and 7 are shown geared together .incldl iven' by a belt l-l and pulley15. Air, oeing the most readily accessible gas for use in thisconnection, is mentioned, but it is to be understood that any othersuitable gas may also beemployed, the in fredien'ts of the ink and thematerial of the cylinder determining its character. The air blast in theillustration is furnished by a suitable nozzle adapted to direct thecurrent of air against the wiped surface of the cylinder 5. In theillustration this is in the form of a tube 16 having on its side towardthe'cylinder a gent of incidence and the region of application oftheblast of air. This adjustability is afiorded in the illustration bymeans of rock arms '18 adapted to be held in their position ofadjustment by set screws 18. The tube 16 is shown rotatablyadjustable inthe sockets at the ends'of such arms, and set screws 18 are provided forholding it in its position of adjustment therein.

A compressed air reseri'oir is shown at 19 for supplying the air. Aflexible tube 20 is shown connecting the tank and tube 16. A stop cock521 is shown for regulating the air supply. The source of air pressureis not shown. the tank inlet 22 being assumerb to be connected with somesuitable source.

The product of my improved apparatus is a clean. well printed sheet orweb, wherein the solid colors are flat and unbroken, and the unprintedportions absolutely free from ink or any trace thereof. The linesbetween the solid color and unprinted portions being sharp and welldefined. and associated with this are the tints and blendings going tomake up the picture, (by whatever local or trade term.known,-photogravure for instance).

Not 'only does theregulable and locally adjustable air blast eliminatethe ink from the unetched portions of the cylinder, but it also rendersthe exposed surface of the ink at the etched portions more susceptibleto the surface of the paper, thereby assuring a transfer oi the maximumquantity of ink from the etched portions of the cylinder to the paper.The quantity of in] transferred, hen this is of the propercvaporativcnature containing the proper volatile ingredients, is readil" controlledby means of this present invention.

As 1 s above pointed out the foregoing is to be understood to beillustrative of my in \cntion, and it is also to be understood thatchanges may be made within the scope of the claims without departingfrom the spirit of the invention.

I claim:

1. An apparatus for intaglio printing comprising a. contilnlonslyrotating design cylinder, means for inking such cylinder,

means for removing surplus ink, and means for directing a blast of airagainst the sur- 3. An apparatus for intaglio printing comprising adesign cylinder, means for continuously rotating said cylinder, meansfor inking said cylinder. :1 scraper for removing the surplus ink, andmeans for directing a regulable air blast against the scraped portion ofthe cylinder.

4. An apparatus for intaglio printing comprising a design cylinder.means for inking the same, a pressure cylinder, a scraper between thesaid cylinders for removing surplus ink. means for directing an airblast against the cylinder between the scraper and the pressurecylinder. and means for adjusting the position of the same between saidscraper and pressure cylinder.

V 5. An apparatus for intaglio printing comprising a design cylinder.means for inking the same, a pressure cylinder, :1. scraper betweenthesaid cylinders for removing smplus ink. means for directing an airblast against the cylinder between the scraper and the pressurecylinder, means for adjusting the position of the same between saidscraper and pressure cylinder, and means fpr regulating the blast ofair.

' 6. Apparatus for intaglio printing which comprises, a design cylinder,means for inking the same, a scraper for removing surplus ink, and apresure cylinder and a tube diss posed ldngitudinally of the cylinderbetween the scraper and pressure cylinder, and provided with a series ofholes, rock arms carrying said tube and adapted to adjust theposillblldlllcl'etlf relative to the cylinder, said tube beingrotativcly adaptable on said arms. Signed at London, England, this 9thday of June, 1915.

FREDERICK T. CORKETT.

' Correotionin Letters Patent No. 1,191,949.

It is hereby certifiiifii @bat in Letters Potent No. 1,1 91-,949,granted Jul 25, 1916,up0n the applica ti'onof Frederick T corke tt, ofAshtead, England, for an I improvement in Apparatus for InteglioPrinting, an error appears in the printed specification requiringcorrection as follows 2 Page 2, line .35, claim 2, for the word photogrnvure read intaglz'o; pnii that the said Letters Patent should 'be readcae in the Patent Office. 1

Signed and sieailed this 22d day of AugustiA. 1)., 191a.

1mm 1 F. W. n. CLAY,

-Act'ing' Commissioner of Patents. Cl.'1O1-1O4. a

Q with thie jcorreetion therein that the saine may conform to the recordof the

